Wan Maisarah MukhtarNursyamimi Raidah AyobRazman Mohd HalimNurul Diyanah SamsuriNoor Faezah MuratAffa Rozana Abdul RashidKarsono Ahmad Dasuki2024-05-282024-05-2820182289-7992https://akademiabaru.com/submit/index.php/arms/article/view/1668https://oarep.usim.edu.my/handle/123456789/6774Volume: 49 No: 1This work is carried out to study the effect of noble metal thicknesses, namely gold and silver on the SPR characteristics for smart food packaging technology applications. A Kretschmann prism coupling was introduced to excite surface plasmon polaritons (SPP). The optical refractive indices values of gold and silver were set as Rgold=0.1759+3.4104i and Rsilver=0.0585+4.2665i respectively. The thicknesses of noble metal thin films were varied between t=25nm and 95nm with the increment of 10nm for each reading. SPR signal analyses were performed by studying the characteristics of SPR peaks such as Q-factor and FWHM. Both analyses demonstrated an outstanding optical properties of silver at t=55nm in comparison with gold due to its low FWHM and high Q-factor values which proves its ability to generate excellent amount of SPP. The employment of silver witnessed the enhancement of Q-factor value up to 7.09% and the decrement of FWHM about 76.58%, relatively with gold. The introduction of silver able to convert 87.20% SPP, whilst the usage of gold only capable to excite 81.4% SPP. In conclusion, application of silver noble metal at t=55nm able to generate maximum SPR. This excellent criterion placed silver as a spectacular candidate in the development of low cost and high sensitive SPR sensor for food quality assessment applications.en-USSurface Plasmon Resonance (SPR), noble metals, FWHM, Q-factor, smart food packagingArticle19491